/*
* carl9170 firmware - used by the ar9170 wireless device
*
- * Clock, Timer & Timing functions
+ * timer code
*
* Copyright (c) 2000-2005 ZyDAS Technology Corporation
* Copyright (c) 2007-2009 Atheros Communications, Inc.
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
- * Copyright 2009, 2010 Christian Lamparter <chunkeey@googlemail.com>
+ * Copyright 2009-2012 Christian Lamparter <chunkeey@googlemail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * with this program; If not, see <http://www.gnu.org/licenses/>.
*/
#include "carl9170.h"
-#include "printf.h"
#include "timer.h"
-#include "wl.h"
#include "gpio.h"
+#include "printf.h"
+#include "wl.h"
void timer_init(const unsigned int timer, const unsigned int interval)
{
orl(AR9170_TIMER_REG_INTERRUPT, BIT(timer));
}
-static void clock_calibrate(void)
-{
- uint32_t t0, loop = 13;
-
- t0 = get_clock_counter();
-
- /*
- * TODO:
- * Write this code in assembler, so the reading is accurate
- * and can be used to correct the timer intervals.
- */
- while (((get_clock_counter() - t0) & (BIT(18)-1)) < 1000)
- loop += 9; /* really rough uOP estimation */
-
- fw.bogoclock = loop;
-}
-
-void clock_set(const bool on, const enum cpu_clock_t _clock)
+void clock_set(enum cpu_clock_t clock_, bool on)
{
/*
* Word of Warning!
* This setting does more than just mess with the CPU Clock.
* So watch out, if you need _stable_ timer interrupts.
*/
-
- set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | _clock));
- clock_calibrate();
+#ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
+ if (fw.phy.frequency < 3000000)
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
+ else
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5143);
+#else
+ set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
+#endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
+
+ fw.ticks_per_usec = GET_VAL(AR9170_PWR_PLL_ADDAC_DIV,
+ get(AR9170_PWR_REG_PLL_ADDAC));
+
+ set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | clock_));
+
+ switch (clock_) {
+ case AHB_20_22MHZ:
+ fw.ticks_per_usec >>= 1;
+ case AHB_40MHZ_OSC:
+ case AHB_40_44MHZ:
+ fw.ticks_per_usec >>= 1;
+ case AHB_80_88MHZ:
+ break;
+ }
}
static void timer0_isr(void)